package com.gxc.web;

import com.gxc.pojo.Book;
import com.gxc.pojo.Page;
import com.gxc.service.BookService;
import com.gxc.service.impl.BookServiceImpl;
import com.gxc.utils.WebUtils;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @Classname ClientBookServlet
 * @Description TODO
 * @Date 2020/11/18 11:49
 * @author by 97830
 */
public class ClientBookServlet extends BaseServlet{
    private BookService bookService = new BookServiceImpl();

    protected void page(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //1 获取请求的参数 pageNo 和 pageSize
        int pageNo = WebUtils.parseInt(req.getParameter("pageNo"), 1);
        int pageSize = WebUtils.parseInt(req.getParameter("pageSize"), Page.PAGE_SIZE);
        //2 调用BookService.page(pageNo，pageSize)：Page对象
        Page<Book> page = bookService.page(pageNo,pageSize);
        page.setUrl("client/bookServlet?action=page");
        //3 保存Page对象到Request域中
        req.setAttribute("page",page);
        //4 请求转发到pages/client/index.jsp页面
        req.getRequestDispatcher("/pages/client/index.jsp").forward(req,resp);
    }

    protected void pageByPrice(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //1 获取请求的参数 pageNo 和 pageSize,min,max
        int pageNo = WebUtils.parseInt(req.getParameter("pageNo"), 1);
        int pageSize = WebUtils.parseInt(req.getParameter("pageSize"), Page.PAGE_SIZE);
        int min = WebUtils.parseInt(req.getParameter("min"), 0);
        int max = WebUtils.parseInt(req.getParameter("max"), Integer.MAX_VALUE);

        //2 调用BookService.page(pageNo，pageSize,min,max)：Page对象
        Page<Book> page = bookService.pageByPrice(pageNo,pageSize,min,max);

        StringBuilder strUrl = new StringBuilder("client/bookServlet?action=pageByPrice");
        //如果有最小价格的参数，追加到分页条的地址参数中
        if (req.getParameter("min") != null){
            strUrl.append("&min=").append(req.getParameter("min"));
        }
        //如果有最大价格的参数，追加到分页条的地址参数中
        if (req.getParameter("max") != null){
            strUrl.append("&max=").append(req.getParameter("max"));
        }
        page.setUrl(strUrl.toString());

        //3 保存Page对象到Request域中
        req.setAttribute("page",page);
        //4 请求转发到pages/client/index.jsp页面
        req.getRequestDispatcher("/pages/client/index.jsp").forward(req,resp);
    }
}